www.jpcycles.com / They lied and promised a lot

I placed order on www.jpcycles.com. I did it several weeks ago already, but after that I received only fake promises and lies. The seller informed me that they have these parts, but it was lie. They continued to lie and I heard these fake promises and speeches within several weeks. I understood that they scammed me, so I asked for money back and still no info from the seller. Please, help me to solve this big problem.